JP2016522528A - Manufacturing method of security thread or stripe - Google Patents

Abstract

The present invention relates to the field of protecting high value documents and high value goods from counterfeiting and illegal copying. In particular, the present invention relates to a method of manufacturing a security thread or stripe that is incorporated in or on a security document, and a security document that includes the security thread or stripe. The disclosed security thread or stripe comprises a first plurality of magnets having an orientation that follows a convex curve when viewed from a side where the first solidified coating and the second solidified coating appear to be at least partially integrated. Or a magnetizable pigment particle and a first solidified coating and a second solidified coating having an orientation according to a concave curvature when viewed from the side of a security thread or stripe that appears to be at least partially integrated. And a second solidified coating comprising a plurality of magnetic or magnetizable pigment particles to form a multiple rolling bar effect. [Selection] Figure 3A

Description

Detailed Description of the Invention

[Field of the Invention]
[001] The present invention relates to the field of protecting high value documents and high value goods from counterfeiting and illegal copying. In particular, the present invention relates to a method of manufacturing a security thread or stripe that is embedded in or on a security document, wherein the security thread or stripe exhibits a dynamic visual movement effect when tilted.

[Background of the invention]
[002] Security documents such as banknotes, high-value documents and cards, transportation tickets and cards, tax banderol, product labels, etc. as the quality of color copies and printed materials continues to improve In the past, various security measures have been incorporated into such documents in an attempt to protect them from forgery, alteration, or illegal copying. Typical examples of security measures include optically changing pigments, magnetic or magnetizable thin film interference pigments, particles with interference coatings, thermochromic pigments, photochromic pigments, luminescent compounds, infrared absorption There are security threads or stripes, windows, fibers, planchettes, foils, transfer designs, holograms, watermarks, security inks, or compositions, etc. that contain compounds, ultraviolet light absorbing compounds, or magnetic compounds.

  [003] Security threads embedded in a substrate are known to those skilled in the art as an efficient means of protecting security documents and banknotes from forgery. US Patent No. 0,964,014, US Patent No. 4,652,015, US Patent No. 5,068,008, US Patent No. 5,324,079, International Publication No. 90/08367, International Publication 92/111142, WO 96/04143, WO 96/39685, WO 98/19866, European Patent Application Publication No. 0 021 350, European Patent Application Publication No. 0 185 396, European Patent Application Publication No. 0 303 725, European Patent Application Publication No. 0 319 157, European Patent Application Publication No. 0 518 740, European Patent Application Publication No. 0 608 078, and European Patent Application Publication No. 1 498 545. As well as references cited in those documents. A security thread is a filament of metal or plastic that is incorporated into a substrate for printing security documents and banknotes during the manufacturing process. The security thread or stripe comprises specific security elements for authenticating security documents, in particular banknotes, by the general public and / or machines. Security elements suitable for such purposes include, but are not limited to, metal coatings, optically changing compounds, luminescent compounds, microtext, and magnetic functions.

  [004] For the purpose of protecting high-value documents such as banknotes from counterfeiting, an optically changing security thread or stripe that exhibits a color transition or a color change when the viewing angle is changed is the high-value document. It has been proposed as a security function to be incorporated in or on the surface. Protection from counterfeiting is based on the changing color effect that the optically changing security element gives to the viewer depending on the viewing angle or direction.

  [005] In addition to static security functions used to protect security documents from forgery and illegal copying, dynamic security functions have been developed that provide the illusion of optical movement. In particular, security elements have been developed that utilize oriented magnetic or magnetizable pigments and optically changing magnetic or magnetizable pigments that provide the illusion of optical motion.

  [006] US Pat. No. 7,047,883 discloses the creation of an optically changing dynamic effect known as the “rolling bar” function. The “rolling bar” function gives an optical motion illusion to an image composed of oriented magnetic pigments or magnetizable pigments. U.S. Pat. No. 7,517,578 and WO 2012/104098 disclose a “double rolling bar” function and a “triple rolling bar” function, respectively, which move in opposite directions when tilted. appear. A printed “rolling bar” type image shows a single band or multiple contrasting bands that appear to move (“roll”) when the image is tilted with respect to the viewing angle. Such images are known to be easily recognized by people on the road, and the illusionary characteristics cannot be reproduced by commonly available office equipment for color scanning, printing, and copying. The “rolling bar” function is based on a specific orientation of the magnetic or magnetizable pigment. In particular, magnetic or magnetizable pigments are arranged to form a curved surface according to either a convex curvature (also referred to in the art as negative curvature orientation) or a concave curvature (also referred to in the art as positive curvature orientation). .

  [007] WO 2012/104098 discloses a method of producing a “triple rolling bar” function, which comprises: a) applying a coating composition comprising particles of a magnetic pigment or magnetizable pigment to a substrate B) orienting the magnetic or magnetizable pigment particles according to a first curved surface by applying a first magnetic field; and c) the applied coating composition in a first region. Fixing the magnetic pigment particles in their respective positions and orientations by selectively solidifying the object; d) the magnetic or magnetizable pigment particles in the unsolidified portion of the coating composition; Applying a magnetic field of 2 to align in accordance with the second curved surface; and e) solidifying the applied coating composition in the second region to place the magnetic pigment particles in their respective positions and arrangements. And securing the. In order to realize a region containing pigment particles oriented according to a negative curvature and a region containing pigment particles oriented according to a positive curvature, the above disclosed method, on the other hand, applies a magnet from the bottom of the substrate. On the other hand, it is necessary to orient the pigment particles by applying a magnet from the top of the substrate.

  [008] However, including a substrate, one region includes magnetic or magnetizable pigment particles oriented to follow a negative curvature, and another region is magnetic or magnetizable to be oriented to follow a positive curvature The disclosed method for obtaining a security element that combines at least two regions containing various pigment particles requires the step of applying a magnetic device from above the substrate, ie the magnetic device is magnetic pigment or magnetizable It will face an unsolidified composition containing pigment particles, thus increasing the overall complexity of the security element manufacturing method. For example, an unsolidified composition should not be brought into direct contact with a magnetic device in order to avoid or eliminate a reduction in optical effects. In addition, the strength of the magnetic field decreases rapidly with distance, so placing the magnetic device a long distance away from the unsolidified composition to avoid direct contact causes the orientable pigment particles to have a weaker magnetic field. As a result, the remarkable optical effect is reduced.

  [009] Therefore, there is a need for a simpler and more efficient method for producing highly dynamic security threads or stripes.

[Overview]
[010] Therefore, the object of the present invention is to overcome the above-mentioned drawbacks of the prior art. This is accomplished by providing a method of manufacturing a security thread or stripe, the method being a first structure comprising a transparent substrate and a first plurality of magnetic or magnetizable pigment particles, The pigment particles are dispersed in the first solidified coating and oriented to exhibit a rolling bar effect that rolls in a first direction when viewed from the side with the first solidified coating. The structure is a second structure comprising a transparent substrate and a second plurality of magnetic or magnetizable pigment particles, wherein the pigment particles are dispersed in a second solidified coating and second solidified Laminating with a second structure, oriented to exhibit a rolling bar effect that rolls in a first direction when viewed from one side, so that the transparent substrate faces towards the periphery, A first solidified coating and a second solidified coating And the first solidified coating and the second solidified coating appear to be at least partially integrated from one side of the security thread or stripe. , Thereby exhibiting the effect of a rolling bar that rolls in opposite directions. In particular, the method for producing the security thread or stripe is a first structure comprising a transparent substrate and a first plurality of magnetic or magnetizable pigment particles, wherein the pigment particles comprise a first solidified coating. A first structure, a transparent substrate and a second plurality of magnetic or magnetizable pigments, wherein the first structure is oriented to follow a convex curvature when viewed from the side with the first solidified coating The pigment particles are dispersed in the second solidified coating and are oriented to follow a convex curve when viewed from the side with the second solidified coating. Laminating with a second structure, so that the transparent substrate is directed towards the periphery and the first solidified coating and the second solidified coating are included between the transparent substrates And the first solidified coating and the second solidified coating are Adjacent to or spaced apart from each other, the first solidified coating and the second solidified coating appear to be at least partially integrated from one side of the security thread or stripe, A first plurality of magnetic or magnetizable pigments having an orientation according to a convex curvature when viewed from the side of a security thread or stripe in which one solidified coating and a second solidified coating appear to be at least partially integrated A first solidified coating comprising particles and an orientation according to a concave curve when viewed from the side of a security thread or stripe where the first solidified coating and the second solidified coating appear to be at least partially integrated Forming a multiple rolling bar effect by including a second plurality of magnetic or magnetizable pigment particles having a second solidified coating.

[011] Also described herein are security threads or stripes obtained by the methods described herein.
In one embodiment, there is provided the step of slicing the laminated structure to produce a plurality of security threads or stripes that each have the effect of a rolling bar rolling in opposite directions.
In one embodiment, the method includes adding one or more adhesive layers to the first structure and / or the second structure to bond the first structure and the second structure in a stacked structure. including.
In one embodiment, the method includes inverting the first structure relative to the second structure and stacking the two structures in a relatively inverted orientation.
In one embodiment, at least one of the first and second structures has a rolling bar effect portion and a portion without the rolling bar effect, and the portion of the two structures without the rolling bar effect is one of the two structures. The first structure and the second structure are stacked so as to overlap the rolling bar effect portion of the other structure of the first and second structures.
In one embodiment, the method provides a precursor structure that exhibits the effect of one or more rolling bars rolling in a first direction, cutting the precursor structure to obtain first and second substrates, The first and second structures have the effect of a rolling bar that rolls in the same direction as before the inversion, and the effect of a rolling bar that rolls in the opposite direction in the relatively inverted direction. Reversing the material relatively.
In one embodiment, at least one of the first and second substrates is provided with a plurality of spaced apart strips of magnetic or magnetizable particles oriented to exhibit a rolling bar effect.

  [012] In one embodiment, the method provides first and second substrates comprising a plurality of spaced apart stripes of magnetic or magnetizable particles oriented to exhibit a rolling bar effect. The first substrate and the second substrate together at a position where the stripe pattern is shifted so that the stripe pattern of the structure of one of the two substrates matches the space between the stripe pattern of the other substrate. Including laminating materials.

  [013] Also described and claimed herein is a security thread or stripe comprising the above laminated structure, wherein the laminated structure includes a first structure and a second structure, each of the first and second structures being transparent. Comprising a substrate and a plurality of magnetic or magnetizable pigment particles, wherein the pigment particles are dispersed in a solidified coating, oriented to exhibit a rolling bar effect, and the transparent substrate is in a laminated structure The solidified coating of the first and second structures is included between the transparent substrates in the laminated structure, and the first or second structure has an uncovered portion through which security From one side of the thread or stripe, one can see the oriented magnetic or magnetizable pigment particles of the other of the underlying first or second structures, the orientation of the first and second structures Obtained by pigment particles The rolling bar effect appears to be integrated from the one side of the security thread or stripe, and the integrated effect is that the rolling bar provided by the first and second structures, respectively, is opposite when the security thread or stripe is tilted It is an effect that rolls on.

  [014] This specification also describes and claims the use of security threads or stripes described herein to protect security documents from counterfeiting and fraud.

  [015] Also described herein is a security document that includes a security thread or stripe described herein, wherein the security thread or stripe is at least partially embedded within the security document. Or the security thread or stripe is attached to the surface of a security document. The specification also describes a method of manufacturing a security document and a security document obtained or manufactured thereby.

  [016] This specification also describes a method of manufacturing a security document and the security document obtained or manufactured thereby. The method for producing a security document comprising a security thread or stripe comprises: i) producing a security thread or stripe in the manner described herein; and ii) obtaining the security thread or stripe obtained in step i). Embedding at least partially in the security document or attaching a security thread or stripe obtained in step i) to the surface of the security document.

It is a schematic top view of a security thread that exhibits a double rolling bar effect when tilted. It is a schematic top view of a security thread that exhibits a double rolling bar effect when tilted. It is a schematic diagram explaining the orientation of magnetic or magnetizable pigment particles according to a negative curved surface (convex orientation) when viewed from the side with a solidified coating. It is a schematic diagram explaining the orientation of magnetic or magnetizable pigment particles according to a positive curved surface (concave orientation) when viewed from the side with a solidified coating. It is a schematic diagram explaining the magnetic field generator suitable for forming a convex or concave magnetic field according to the position. It is a schematic diagram explaining the lamination | stacking method which manufactures the security thread | sled or stripe by this invention. Schematic top view of a security thread exhibiting a double rolling bar effect (4A), a triple rolling bar effect (4B), and a multiple rolling bar effect (4C) in the form of a striped pattern (4A-4C) or sign (4D) It is.

[Detailed description]
[017] The following definitions should be used to interpret the meaning of the terms discussed in the detailed description and the terms set forth in the claims.

  [018] As used herein, the article “a” means both one and more than one, and the nouns indicated in the article are not necessarily limited to singular.

  [019] As used herein, the term "about" used in conjunction with an amount or value is intended to mean that the amount or value is in the vicinity of it even if it is a specified value. It means that it may be another value. In general, the term “about” meaning a value is intended to mean a range within ± 5% of the value. As an example, the expression “about 100” means a range of 100 ± 5, that is, a range of 95-105. The range represented by the term “about” preferably means a range within ± 3% of the value, more preferably within ± 1%. In general, when the term “about” is used, it can be expected that results or effects similar to the present invention will be obtained within a range of ± 5% of the indicated value.

  [020] As used herein, the term "and / or" means that all or only one member of the group may be present. For example, “A and / or B” shall mean only A, only B, or both A and B. When referring to “A only”, the term also encompasses the possibility that B does not exist, ie “A only, not B”. When referring to “B only”, the term also encompasses the possibility that A does not exist, ie, “B only and no A”.

  [021] As used herein, the term "at least" shall define one or more than one, such as one, two, or three.

  [022] As used herein, the term "comprising" shall be non-exclusive and open-ended. Thus, for example, a composition containing Compound A may contain other compounds in addition to A.

  [023] The term "coating composition" refers to a liquid or slurry that can form a layer or coating on a solid substrate, but preferably is applied by a coating or printing method. The coating compositions described herein comprise a plurality of magnetic or magnetizable pigment particles and a binder.

  [024] The term "solidified" means that pigment particles that are magnetic or magnetizable within the coating are fixed in their position and orientation.

  [025] As used herein, the term "indicator" includes, but is not limited to, discrete patterns such as symbols, alphanumeric symbols, motifs, letters, words, numbers, logos, and patterns including graphics. It shall mean a layer.

  [026] A thread or stripe consists of a long security element. “Long” means that the longitudinal dimension of the security element is at least twice the transverse dimension.

  [027] As used herein, the term "pigment" should be construed in accordance with the definitions given in DIN 55943: 19933-11 and DIN EN 971-1: 1966-09. A pigment, unlike a dye, is a powder or flake-shaped substance that does not dissolve in the surrounding medium.

  [028] As used herein, the terms "convex" and "concave" refer to the first solidified coating and second whenever the security thread or stripe described herein is associated. The observation is from the side of the security thread or stripe where the solidified coating appears to be at least partially integrated.

  [029] As used herein, the terms "convex" and "concave" always refer to the solidification of a structure as it relates to the first structure and the second structure described herein. The standard is to observe from the side with the covered coating.

  [030] The present invention provides a method of manufacturing a security thread or stripe comprising a laminated structure comprising two transparent substrates surrounding at least two regions, the at least two regions being oriented magnetic or magnetizable It consists of two solidified coatings containing pigment particles, each reflecting light in different directions. In particular, the present invention provides a security thread or stripe that exhibits the effect of multiple rolling bars and a method of manufacturing a security thread or stripe derived therefrom. According to one embodiment, the present invention provides a method of manufacturing a security thread or stripe comprising two regions, ie two solidified coatings (also called double rolling bar effect) exhibiting a rolling bar effect, The rolling bar effect of a region is different from the rolling bar effect of the other region in terms of rolling effect (see, eg, FIGS. 1A-1D, 4A, and 4D. In these diagrams, the security thread is Including a first solidified coating (1) and a second solidified coating (2) with a rolling bar effect in the opposite direction). According to another embodiment, the present invention provides a method of manufacturing a security thread or stripe comprising three regions, ie three solidified coatings (also called triple rolling bar effect) that exhibit a rolling bar effect, One rolling bar effect is different from the rolling bar effect of the other two regions (see, eg, FIG. 4B. In FIG. 4B, the security thread has two first solidified coatings (1) and a second solidified The first coating and the second coating have rolling bar effects in opposite directions). According to another embodiment, the present invention provides a method of manufacturing a security thread or stripe comprising four or more regions, ie, four or more solidified coatings exhibiting a rolling bar effect, and a one region rolling bar The effect is different from the rolling bar effect in other areas. The present invention provides a simpler and more efficient method of producing highly dynamic security threads or stripes compared to the prior art. The resulting security thread or stripe exhibits a very dynamic appearance when tilted.

  [031] FIGS. 1A-1D show top views of security threads or stripes that exhibit a double rolling bar effect, wherein the double rolling bar effect includes a first solidified coating that exhibits two different rolling effects ( Obtained by a combination of 1) and a second solidified coating (2), said first and second solidified coatings comprise particles of oriented magnetic pigments or magnetizable pigments. When tilted with respect to the viewing angle of the security thread or stripe (indicated by the arrows in FIGS. 1A-1D), two light colored bands or bars (3, 3 ′) move in opposite directions on the security thread or stripe, respectively. Or appear to roll.

  [032] As noted above, the “rolling bar” effect or function is based on the specific orientation of the magnetic or magnetizable pigment particles within the solidified coating on the substrate. The particles of magnetic or magnetizable pigment in the binder are arranged in an arcuate pattern relative to the surface of the substrate, creating a contrasting rod on the image, the contrasting rod being It appears to move as the image is tilted with respect to the viewing angle. In particular, magnetic or magnetizable pigment particles are either convexly curved (also referred to in the art as negative curvature orientation; see FIG. 2A) or concavely curved (also referred to in the art as positive curvature orientation. FIG. 2A). Are arranged so as to draw a curved surface. A solidified coating comprising pigment particles having an orientation according to a convex curve (negative curvature orientation) will move when the security thread or stripe is tilted back (ie, the top of the security thread or stripe moves away from the observer). , The lower part of the security thread or stripe moves in a direction towards the viewer), showing a visual effect characterized by the rolling bar moving down. A solidified coating comprising pigment particles having an orientation according to a concave curvature (positive curvature orientation) exhibits a visual effect characterized by the rolling bar moving up when the security thread or stripe is tilted back.

  [033] As described in the prior art, for example, US Pat. No. 7,047,888, US Pat. No. 7,517,578 and WO 2012/104098, and as shown in FIG. Known method for obtaining the orientation of magnetic or magnetizable pigment particles according to the curved surface (curved as seen from the side of the figure, which becomes convex when viewed from the side with the solidified coating, see FIG. 2A) Includes using a magnetic device to orient the pigment particles, which device is placed under the substrate (top of FIG. 2C). The orientation of the magnetic or magnetizable pigment particles on the substrate according to a positive curved surface (curved as viewed from the side of the solidified coating, which is concave when viewed from the side, see FIG. 2B) In order to obtain, the magnetic device used to orient the pigment particles is placed above the substrate (lower part of FIG. 2C). That is, the magnetic device faces the coating containing pigment particles that are magnetic or magnetizable. 1A-1D, the first solidified coating (1) and the second solidified coating (2) exhibit two different rolling effects, i.e. one of the solidified coatings is the side with the solidified coating. Magnetic or magnetizable pigment particles that have an orientation that follows a curvature that is convex when viewed from the other, and the other coating is magnetic that has an orientation that follows a curvature that becomes concave when viewed from the side with the solidified coating Or magnetizable pigment particles. However, as described above, when the magnetic or magnetizable pigment particles are oriented by applying a magnetic field generator from the side facing the magnetic or magnetizable pigment particles, the complexity of the entire manufacturing method is greatly increased.

  [034] A method of manufacturing a security thread or stripe according to the present invention is a first structure comprising a transparent substrate and a first plurality of magnetic or magnetizable pigment particles, wherein the pigment particles are first A first structure comprising a transparent substrate and a second plurality of magnetisms or magnetizations dispersed in the solidified coating and oriented to follow a convex curvature when viewed from the side with the first solidified coating A second structure comprising possible pigment particles, wherein the pigment particles are dispersed in the second solidified coating and oriented to follow a convex curve when viewed from the side with the second solidified coating And laminating with a second structure, wherein the laminating step includes a transparent substrate oriented in a peripheral direction, and a first solidified coating and a second solidified coating are included between the transparent substrates. To form a laminated structure.

  [035] The method of manufacturing a security thread or stripe according to the present invention is such that the transparent substrate is oriented in the surrounding direction and the first solidified coating and the second solidified coating are included between the transparent substrates. And laminating the first structure with the second structure to form a laminated structure. The laminating step may include conventional laminating methods known in the art, such as heat and / or the first and second structures further optionally including additional material present on at least one of the surfaces to be joined. This is done in a manner consisting of applying pressure. Typically, the additional material comprises a conventional laminated adhesive layer or a conventional tie layer, such as an aqueous composition, a solvent-based composition, a solvent-free composition, or a UV curable composition. . In one embodiment, the method includes adding one or more adhesive layers to the first structure and / or the second structure to bond the first structure and the second structure in a stacked structure. including.

  [036] By performing the lamination step, the first solidified coating and the second solidified coating have an orientation that follows a convex curve when viewed from the side of the security thread or stripe that appears to be at least partially integrated. A first solidified coating comprising a first plurality of magnetic or magnetizable pigment particles and the side of the security thread or stripe in which the first solidified coating and the second solidified coating appear to be at least partially integrated A second solidified coating comprising a second plurality of magnetic or magnetizable pigment particles having an orientation in accordance with a concave curvature when viewed from a security thread or stripe, thereby comprising The security thread or stripe described exhibits a plurality of rolling bar effects, the first solidified coating and the second solidified coating being secured. It appears to at least partially integrated from one side of the tee thread or stripe. “Looks united” means that the first solidified coating and the second solidified coating appear to combine and thereby provide a very dynamic effect.

  [037] The first structure includes a transparent substrate and a first solidified coating, and the second structure includes a transparent substrate and a second solidified coating, the transparent substrates being the same, or Unlikely, the first and second solidified coatings are the same or different and exhibit the same rolling bar effect (convex curvature) when viewed from the side with the solidified coating. Both solidified coatings are formed between transparent substrates, and the first plurality of magnetic or magnetizable pigment particles is at least partially integral with the first solidified coating and the second solidified coating. A second solidified coating comprising a second plurality of magnetic or magnetizable pigment particles having an orientation according to a convex curvature when viewed from the side of a security thread or stripe that appears to be solidified is a first solidified Laminating the first structure with the second structure so that the coating and the second solidified coating have an orientation that follows a concave curvature when viewed from the side of the security thread or stripe that appears to be at least partially integrated. (See, eg, FIGS. 3A-3B), resulting in a security thread or stripe that exhibits the effect of multiple rolling bars.

  [038] In one embodiment, the method includes inverting the first structure relative to the second structure and stacking the two structures in a relatively inverted orientation.

  [039] As shown in FIG. 3A (top), the first structure includes a transparent substrate (S1) and a first solidified coating (1), and the second structure includes a transparent substrate (S2) and a first substrate. Two solidified coatings (2), wherein the transparent substrates (S1 and S2) are the same or different, and the first and second solidified coatings (1 and 2) are the same, Or, differently, it exhibits the same rolling bar effect (convex curvature) when viewed from the side with solidified coating (shown visually in the figure). The first solidified coating (1) covers the entire surface of the transparent substrate (S1), whereas the second solidified coating (2) covers only a part of the transparent substrate (S2), Therefore, a partial area of the transparent substrate (S2) remains blank. When the first structure is laminated with the second structure so that both solidified coatings (1 and 2) are contained between the transparent substrates (S1 and S2), the first solidified coating (1) is: When viewed through the blank area of the coating, it exhibits the same rolling bar effect (convex curvature) as before lamination, whereas the second solidified coating (2) exhibits a rolling bar effect (concave curvature) in the opposite direction.

  [040] As shown in FIG. 3B (top), the first structure includes a transparent substrate (S1) and a first solidified coating (1), and the second structure includes a transparent substrate (S2) and a first substrate. Comprising two solidified coatings (2), the transparent substrates (S1 and S2) being the same or different, the first coating and the second solidified coating (1 and 2) being the same Or, differently, it exhibits the same rolling bar effect (convex curvature) when viewed from the side with solidified coating (shown visually in the figure). The first solidified coating (1) covers only a part of the substrate of the transparent substrate (S1), so that a part of the region of the transparent substrate (S1) is left blank and second solidified. The coating (2) also covers only a part of the transparent substrate (S2), so that a partial region of the transparent substrate (S2) remains blank. When the first structure is laminated with the second structure so that both solidified coatings (1 and 2) are contained between the transparent substrates (S1 and S2), the first solidified coating (1) is: The second solidified coating (2) exhibits the rolling bar effect (concave curve) in the opposite direction, while exhibiting the same rolling bar effect (convex curve) as before lamination. The terms “concave” and “convex” always refer to the field of view (see the eyes of FIGS. 3A-3B).

  [041] According to one embodiment of the present invention, the first structure and the second structure are a) preferably from a coating or printing method, more preferably from the group consisting of rotogravure, screen printing, and flexographic printing. Applying a coating composition comprising a binder and a plurality of magnetic or magnetizable pigment particles on a transparent substrate by a selected printing method; and b) applying a magnetic field to the coating composition in the first state. Exposing the generator to a magnetic field; and c) solidifying the coating composition into a second state, thereby fixing the magnetic or magnetizable pigment particles in their selected positions and orientations, and transparent Producing separately a first structure comprising a first solidified coating on a substrate and a second structure comprising a second solidified coating on a transparent substrate.

  [042] According to another embodiment of the present invention, the first structure and the second structure are a) preferably a coating method or a printing method, more preferably a group consisting of rotogravure, screen printing, and flexographic printing. Applying a coating composition comprising a binder and a plurality of magnetic or magnetizable pigment particles onto a transparent substrate by a printing method selected from: b) a coating composition in a first state Exposing to the magnetic field of the magnetic field generator; and c) solidifying the coating composition in a second state by fixing the magnetic or magnetizable pigment particles in their selected positions and orientations. And d) cutting the precursor structure obtained in step c) to obtain a first structure and a second structure. The precursor structure can be cut in the cross machine direction or the machine direction, preferably in the machine direction.

  [043] In one embodiment, the method delivers a precursor structure comprising a transparent substrate and oriented magnetic or magnetizable pigment particles dispersed in a solidified coating disposed on the transparent substrate, and the precursor Cutting the structure to obtain first and second structures. The feeding is in the machine direction and the cutting is in the cross machine direction or the machine direction, preferably in the machine direction. The method includes relatively inverting the first or second structure and stacking the two structures together in a relatively inverted orientation.

  [044] In one embodiment, the first structure and the second structure are a) printing selected from the group consisting of a) preferably a coating or printing method, more preferably rotogravure, screen printing, and flexographic printing. Applying a coating composition comprising a binder and a plurality of magnetic or magnetizable pigment particles onto a transparent substrate by the method, b) applying a coating composition in a first state to a magnetic field Exposing the generator to a magnetic field; and c) solidifying the coating composition into a second state, thereby fixing the magnetic or magnetizable pigment particles in their selected positions and orientations and solidifying. And d) cutting the precursor structure obtained in step c) to obtain a first structure and a second structure.

  [045] In one embodiment, at least one of the first and second structures has a rolling bar effect portion and a portion without a coating (ie, a solidified coating comprising oriented magnetic or magnetizable pigment particles). The first structure and the second structure are stacked such that the uncovered portion of one structure of the two structures overlaps the rolling bar effect portion of the other structure of the first and second structures. Is done.

  [046] In one embodiment, the method includes obtaining a precursor structure exhibiting one or more rolling bar effects that roll in a first direction, and cutting the precursor structure to obtain first and second structures. In addition, the first or second structure is relatively inverted, and the first and second structures exhibit a rolling bar effect that rolls in the same direction as before the inversion, and in the opposite direction in the relatively inverted direction. To present a rolling bar effect that rolls to

  [047] In one embodiment, at least one of the first and second transparent substrates is provided with a plurality of spaced apart stripes of magnetic or magnetizable pigment particles oriented to exhibit a rolling bar effect. It is done.

  [048] In one embodiment, the method provides first and second structures comprising a plurality of spaced apart stripes of magnetic or magnetizable pigment particles oriented to exhibit a rolling bar effect. Including stacking the first and second structures together with the striped pattern so that the striped pattern of one of the two structures is in a position that coincides with the space between the striped pattern of the other structure .

  [049] The step of orienting the magnetic or magnetizable pigment particles by exposing the coating composition in the first state to the magnetic field of the magnetic field generator (step b)) comprises applying the coating composition (step It can be carried out after or simultaneously with a)). The application step a) is preferably performed simultaneously with step b) of orienting the magnetic or magnetizable pigment particles by exposing the coating composition to the magnetic field of a magnetic field generator.

  [050] Therefore, it is important to note that the coating compositions described herein must have a first state, ie, a liquid or paste state, in which the coating composition is sufficiently wet. Magnetic or magnetizable pigment particles that are soft, and thus dispersed in the coating composition, can freely move, rotate, and / or orient when exposed to a magnetic field and are second solidified ( For example, in the second state, the pigment particles are fixed or solidified in their respective positions and orientations. Such first and second states are preferably obtained by using any kind of coating composition. For example, components of the coating composition other than magnetic or magnetizable pigment particles can take the form of coating compositions such as those used in security applications such as banknote printing.

  [051] The first and second states described above can be obtained by using a binder that significantly increases in viscosity in response to a stimulus, such as a change in temperature or exposure to electromagnetic radiation. That is, as the fluid binder solidifies or solidifies, the binder changes to a second state, ie, a solidified or solid state, and the pigment particles are fixed in their current position and orientation, You can no longer move or rotate.

  [052] As known to those skilled in the art, the components contained in the coating composition applied to the substrate and the physical properties of the coating composition are determined by the method used to transfer the coating composition to the surface. It depends on the nature. Accordingly, the binders included in the coating compositions described herein are generally selected from those known in the art, and are coating or printing methods used to apply the coating composition; And depending on the solidification method selected.

  [053] The coating composition is preferably applied to the transparent substrate by a coating or printing method, more preferably a printing method selected from the group consisting of rotogravure, screen printing, and flexographic printing. These methods are well known to those skilled in the art and are described, for example, in Printing Technology, J. MoI. M.M. Adams and P.M. A. See Dolin, Delmar Thomson Learning, 5th edition.

  [054] As known to those skilled in the art, the term "rotary gravure" refers to the printing method described in, for example, "Handbook of print media", Helmut Kippan, Springer Edition, page 48. A rotogravure is a printing method in which image elements are engraved on the surface of a cylinder. The non-image area remains at a constant original height. Prior to printing, the entire printing plate (non-printing elements and printing elements) is dipped into the composition and filled with the composition. Prior to printing, the composition is removed from the non-image areas with a wiper or blade so that the composition remains only in the cells. When the substrate to be printed passes between the cylinder and a rubber pressure roller (hereinafter “pressure roller”), the substrate acts like a blotting paper and absorbs the composition remaining in the cells. The image is transferred from the cell to the substrate, typically by a pressure in the range of 1-4 bar and the adhesion between the substrate and the ink. The term “rotary gravure” does not include, for example, intaglio printing methods that rely on another type of ink (also referred to in the art as engraving steel molds or copperplate printing methods).

  [055] Flexo printing preferably uses an apparatus with a doctor blade, preferably a chambered doctor blade, an anilox roller, and a plate cylinder. An anilox roller advantageously has small cells whose capacity and / or density determine the application rate of the composition. The doctor blade contacts the anilox roller and scrapes off excess composition at the same time. The anilox roller transfers the composition to the plate cylinder, which ultimately transfers the composition to the substrate. Specific designs can be realized using the designed photosensitive resin plates. The plate cylinder can be made from a polymer material or an elastomer material. The polymer is primarily used as a photosensitive resin for the plate and sometimes as a seamless coating on the sleeve. The plate made of photosensitive resin is made of a photosensitive polymer that is solidified by ultraviolet (UV) light. The photosensitive resin plate is cut to a required size and placed in a UV light exposure apparatus. One side of the plate is entirely exposed to UV light to solidify or cure the base of the plate. The plate is then turned over and the reverse operation is performed on the uncured side, exposing the plate to further UV light. This solidifies the image area of the plate. The plate is then processed to remove unsolidified photosensitive resin from the non-image areas, thereby reducing the plate surface height of those non-image areas. After processing, the plate is dried and a post-exposure amount of UV light is applied to cure the entire plate. For the production of flexographic plate cylinders, see Printing Technology, J. et al. M.M. Adams and P.M. A. Dolin, Delmar Thomson Learning, 5th edition, pages 359-360.

  [056] Screen printing (also referred to in the art as silk screen printing) is a stencil method that is supported by a finely woven mesh of silk, synthetic fibers, or metal threads, tightly attached to a frame. Through which the composition is transferred to the surface. The mesh holes are blocked in the non-image area and are left open in the image area, and the image carrier is called a screen. During printing, the composition is supplied to the frame to fill the entire screen with the composition, and then the composition is forced through the open holes of the screen by sliding an extrusion means such as a squeegee across the screen. At the same time, the surface to be printed is held in contact with the screen and the ink is transferred to the surface. A rotary screen cylinder is preferably used. For screen printing, see, for example, The Printing ink manual, R.A. H. Leach and R.C. J. et al. Pierce, Springer Edition, 5th edition, pages 58-62, and Printing Technology, J. MoI. M.M. Adams and P.M. A. Further described in Dolin, Delmar Thomson Learning, 5th edition, pages 293-328.

  [057] After applying a coating composition comprising a binder and a plurality of magnetic or magnetizable pigments to a transparent substrate, or simultaneously, an external magnetic field using a magnetic field generator to orient according to a desired orientation pattern Is applied to orientate magnetic or magnetizable pigment particles. Thereby, the permanent magnetic pigment particles are oriented so that their magnetic axes coincide with the direction of the external magnetic lines of force at the position of the pigment particles. Magnetizable pigment particles that do not have an intrinsic permanent magnetic field are oriented by an external magnetic field such that the direction of the maximum dimension of the particle coincides with the magnetic field lines at the location of the pigment particle.

  [058] The magnetic or magnetizable pigment particles described herein are oriented by applying an external magnetic field using a magnetic field generator, and the magnetic field generator is preferably a magnetic orientation cylinder. The magnetic orientation cylinder is preferably temperature adjusted to avoid structural degradation and / or maintain good processing characteristics. The magnetic field generator is placed after the printing cylinder, that is, the screen cylinder, the rotary gravure cylinder, the flexographic printing cylinder, or the magnetic field generator is crimped when the coating composition is applied to the transparent substrate by the rotary gravure method. It can be included in or built into the roller. A suitable magnetic orientation cylinder consists of a cylinder having a magnetized outer surface, such as that described in WO 2011/107527. The magnetic orientation cylinder preferably has a magnetized outer surface, and the magnetization is configured to represent a seamless pattern that is repeated with a suitable repeat length, in other words, the length around the cylinder is repeated. It is exactly a multiple of the pattern period (repetition length).

  [059] A magnetic orientation cylinder can be manufactured by winding a flexible permanent magnetic plate (eg, “Plastoferrite”) around a concentric support and fixing in place. As the magnetized permanent magnetic plate, engraved permanent magnetic plates such as those disclosed in International Publication Nos. 2005/002866 and 2008/046702 can be used. In a preferred embodiment, the magnetic orientation cylinder is seamlessly covered with a “plastic magnet” engraved with a seamless repetitive magnetization pattern. Alternatively, a seamless repetitive pattern can be engraved on the outer cylinder surface of the seamless coated cylinder and magnetized as disclosed in WO 2005/002866. The magnetic orientation cylinder described herein may further include a permanent magnet or an electromagnet disposed within a cylindrical support to create the effects disclosed in WO 2008/046702. .

  [060] Magnetized sleeves may also be useful for seamless cylindrical supports, as well as wrapping a flexible magnetic plate around a cylindrical support.

[061] A magnetic orientation cylinder suitable for the present invention is the method disclosed in WO 2011/107527,
a) Hexagonal ferrite of formula MFe ₁₂ O ₁₉ containing high coercivity permanent magnetic powder (eg strontium hexagonal ferrite (SrO ^* 6Fe ₂ O ₃ ) or barium hexagonal ferrite (BaO ^* 6Fe ₂ O ₃ ); cobalt ferrite ( A “hard ferrite” of the formula MFe ₂ O ₄ containing CoFe ₂ O ₄ ) or magnetite (Fe ₃ O ₄ ), where M is a divalent metal ion and substituted derivatives of their isomorphic structure; a samarium cobalt alloy; and a rare earth A cylindrical polymer material with an iron-boron alloy (RE ₂ Fe ₁₄ B, eg “neodymium magnet” Nd ₂ Fe ₁₄ B), where RE is a trivalent rare earth ion or a mixture of trivalent rare earth ions) as a filler The step of obtaining a seamless coated cylinder by coating the support and solidifying the polymer material. The coating and solidification can be accomplished by applying a hot molten thermoplastic composition and cooling to solidify the composition or by applying a plastisol precursor composition and curing with heat. Steps that can be performed by forming and solidifying the plastisol;
b) optionally correcting the outer surface of the coated cylinder to obtain a standard cylinder diameter;
c) magnetizing the outer cylinder surface of step a) or step b).

  [062] The coating and solidification step may be performed by applying a hot molten thermoplastic composition and cooling to solidify the composition or by applying a plastisol precursor composition and curing with heat. Can be formed and solidified.

  [063] The polymeric material mentioned in the coating step a) can be selected from thermoplastic materials commonly used to make "plastic magnets", such as polyethylene and polyamide. Low density polyethylene (LDPE) is hot melt and can be used to prepare plastic magnet compositions (HS Gokturk et al. A TEC '92; Annual Technical of the Society of). Plastics Engineers, Detroit, MI, May 1992; pages 491-494; Journal of Applied Polymer Science, Vol 50, 1891-1901 (1993)). Plastic magnets and rubber magnets were first disclosed in French Patent Application No. 1135734 (MJ Dedek; 1955). JP 56-000851 (Komeno Hiroshi; 1981) discloses a composition of a plastic magnet based on a thermoplastic polyamide resin. H. Stablein, “Hard Ferrites and Plastoferrites”, in Ferro Magnetic Materials, Vol. 3, ed. E. P. See also Wohlfarth, North-Holland Publishing company, 1982, chapter 7, pages 441-602.

[064] The coating of the cylindrical support described in coating step a) is, for example, nylon 6 as a thermoplastic binder and 1.1 to 1.2 micron as a high coercivity permanent magnetic filler. Discloses a method of manufacturing a plastic magnet that relies on strontium hexagonal ferrite (SrO ^* 6Fe ₂ 0 ₃ ) powder with a particle size of the meter. Sakai et al. Intern. Polymer Processing, 6, 26-34 (1991). Alternatively, the coating of the cylindrical support can be performed according to U.S. Pat. No. 3,785,286, U.S. Pat. No. 3,900,595, and U.S. Pat. No. 4,054,685. Discloses a method of coating plastisols using polyvinyl chloride (PVC) in combination with one or more plasticizers and stabilizers. A plastisol composition containing a permanent magnetic filler is prepared, applied to a cylindrical support at a temperature of about 40 ° C to about 50 ° C, and solidified at a temperature of about 200 ° C to about 250 ° C. The plastisol coating is coated in several layers, each layer having a thickness between 0.3 and 1 mm, for a total thickness of 2 to 3.5 mm.

  [065] The high coercivity permanent magnetic powder described in the correction step b) is preferably used in the composition in a demagnetized state in order to prevent the magnetic powder particles from agglomerating magnetically. Demagnetization of magnetic materials (“decausing”) is an operation known to those skilled in the art. Magnetization is preferably applied only after the composition is in place and solidified.

  [066] The optional correction step b) is a mechanical grinding operation performed on a lathe. This action serves to obtain precise mechanical dimensions in order to make the circumference of the cylinder just a multiple of the period of the repetitive magnetization pattern (repeat length).

  [067] The magnetization of the cylinder surface described in magnetizing step c) is known, for example, by applying a magnetic stylus according to US Pat. No. 3,011,436, or as described in US Pat. This can be done by electromagnetically and mechanically imitating the disclosure of 011,436, or by engraving the repetitive magnetization pattern required by a mechanically driven electromagnetic stylus. In a particularly preferred embodiment of the method, the magnetizing step c) comprises engraving a repetitive seamless pattern on the outer surface of the coated cylinder and magnetizing the cylinder. Engraving and magnetization of the outer cylinder surface can be performed as disclosed in WO 2005/002866. In particular, engraving can be performed using an abrading tool selected from the group comprising a mechanical abrading tool, a gas or liquid jet abrading tool, and a laser abrading tool. Magnetization can be applied before or after the engraving step. The magnetization of the outer surface of the cylinder can also be combined with the arrangement of magnets inside a cylindrical support, as disclosed in WO 2008/046702, which can be further combined with permanent magnets or electromagnets. can do.

  [068] As described above, to achieve a coating comprising magnetic or magnetizable pigment particles that are oriented to follow a convex curve (negative curvature orientation) when viewed from one side, the pigment particles are oriented. The magnetic field generating device is applied from the lower side of the substrate opposite to the side where the substrate is coated, that is, from the side facing the transparent substrate (see FIGS. 3A-3B).

  [069] After or simultaneously with the step of orienting the magnetic or magnetizable pigment particles by exposing the coating composition in the first state to the magnetic field of the magnetic field generator (step b)) Solidify (solidification step c) to fix the orientation of the pigment particles. The solidification step c) is preferably performed simultaneously with step b).

  [070] Solidification step c) can be purely physical in nature. Alternatively, solidifying the coating composition preferably involves a chemical reaction, for example solidification is a simple temperature increase that may occur when security documents are normally used (eg up to 80 ° C.). ) Induced by curing without going backwards. The term “cure” or “curable” refers to the chemical reaction, crosslinking, or polymerization of components such that at least one component in the applied coating composition changes to a polymeric material having a molecular weight greater than the starting material. Refers to the process that contains. It is preferable to form a three-dimensional polymer network by curing.

  [071] Such curing generally applies an external stimulus to the coating composition (i) after application to the substrate and (ii) after orienting the magnetic or magnetizable pigment particles. Trigger by. Accordingly, a coating composition suitable for producing the first solidified coating and the second solidified coating is selected from the group consisting of a radiation curable composition, a heat drying composition, and combinations thereof. The solidifying step c) is performed using warm air, radiation (such as infrared radiation, UV-visible radiation, and electron beam radiation), or any combination thereof. Is preferred.

  [072] According to one embodiment of the present invention, the coating composition described herein comprises a heat-drying composition. A heat-drying composition consists of a composition based on any type of water-soluble composition or solvent that is dried with warm air, infrared light, or a combination of warm air and infrared light. Typical examples of heat drying compositions include, but are not limited to, polyester resins, polyether resins, vinyl chloride polymers and vinyl chloride copolymers, nitrocellulose resins, cellulose acetobutyrate or acetopropionate resins, Maleic acid resin, polyamide, polyolefin, polyurethane resin, functional polyurethane resin (for example, carboxylated polyurethane resin), polyurethane alkyd resin, polyurethane- (meth) acrylic resin, urethane- (meth) acrylic resin, styrene (meth) acrylic acid Ingredients containing resins such as resins or mixtures thereof are included. The term “(meth) acrylate” or “(meth) acrylic acid” in the context of the present invention refers to acrylate and its corresponding methacrylate, or acrylic acid and its corresponding methacrylic acid.

  [073] As used herein, the term "solvent-based composition" refers to a composition in which the liquid medium or carrier consists essentially of one or more organic solvents. Examples of such solvents include, but are not limited to, alcohols (eg, methanol, ethanol, isopropanol, n-propanol, ethoxypropanol, n-butanol, sec-butanol, tert-butanol, isobutanol, 2-ethylhexyl). Polyols (eg glycerol, 1,5-pentanediol, 1,2,6-hexanetriol, and mixtures thereof); esters (eg ethyl acetate, n-propyl acetate, acetic acid) n-butyl, and mixtures thereof); carbonates (eg dimethyl carbonate, diethyl carbonate, di-n-butyl carbonate, 1,2-ethylene carbonate, 1,2-propylene carbonate, 1,3-propylene carbonate) Aromatic solvents (such as toluene, xylene, and mixtures thereof); ketones and ketone alcohols (such as acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, diacetone alcohol, and the like) Amides (eg, dimethylformamide, dimethylacetamide, and mixtures thereof); aliphatic or alicyclic hydrocarbons; chlorinated hydrocarbons (eg, dichloromethane, etc.); nitrogen-containing heterocyclic compounds (eg, , N-methyl-2-pyrrolidone, 1,3-dimethyl-2-imidazolidone, and mixtures thereof); ethers (such as diethyl ether, tetrahydrofuran, dioxane, and mixtures thereof); alkyl ethers of polyhydric alcohols ( Such as 2-methoxyethanol, 1-methoxypropan-2-ol, and mixtures thereof); alkylene glycol, alkylene thioglycol, polyalkylene glycol or polyalkylene thioglycol (eg, ethylene glycol, polyethylene glycol (eg, diethylene glycol, Triethylene glycol, tetraethylene glycol, etc.), propylene glycol, polypropylene glycol (eg, dipropylene glycol, tripropylene glycol, etc.), butylene glycol, thiodiglycol, hexylene glycol, and mixtures thereof); nitriles (eg, Acetonitrile, propionitrile, and mixtures thereof), and compounds containing sulfur (eg, dimethyl sulfoxide, Sulfolane, and mixtures thereof). The one or more organic solvents are preferably selected from the group consisting of alcohols, esters, and mixtures thereof.

  [074] According to one embodiment of the present invention, the coating composition described herein comprises a radiation curable composition. Radiation curable compositions include compositions that can be cured by IR radiation, UV visible light radiation (hereinafter “UV-Vis curable”), or electron beam radiation (hereinafter “EB”). included. Radiation curable compositions are known in the art and have been published in volume 7 by John Wiley & Sons in 1997-1998 in collaboration with SITA Technology Limited. & Texts "series and other standard textbooks. The coating composition described herein preferably comprises a UV-Vis curable composition.

  [075] The binder of the UV-Vis curable composition described herein is an oligomer (in the art) selected from the group consisting of radical curable compounds, cationic curable compounds, and mixtures thereof. It is preferably prepared from (also referred to as prepolymer). Cationic curable compounds are cured by a cationic mechanism that liberates cationic species such as acids by activation with the energy of one or more photoinitiators, thereby initiating polymerization to form a binder. . A radically curable compound is cured by a free radical mechanism that liberates free radicals by activation with the energy of one or more photoinitiators, thereby initiating polymerization to form a binder.

  [076] UV-Vis curing of monomers, oligomers, or prepolymers may require the presence of one or more photoinitiators and can be done in several ways. As known to those skilled in the art, the one or more photoinitiators are selected according to the absorption spectrum and selected to match the emission spectrum of the radiation source. Depending on the monomer, oligomer, or prepolymer used to prepare the binder included in the UV-Vis curable compositions described herein, different photoinitiators may be used. . Suitable examples of free radical photoinitiators are known to those skilled in the art and include, but are not limited to, acetophenone, benzophenone, α-aminoketone, α-hydroxyketone, phosphine oxide and phosphine oxide derivatives, and benzyldimethyl ketal. . Suitable examples of cationic photoinitiators are known to those skilled in the art and include, but are not limited to, organic iodonium salts (eg, diaryliodonium salts), oxonium (eg, triallyloxonium salts), and sulfonium salts (eg, Onium salts such as triallylsulfonium salts) are included. Other examples of useful photoinitiators include G. “Chemistry & Technology in P & R, Co., Ltd.,“ Health and Technology in R & D, ”published by John Wiley & Sons in 1998, in collaboration with SITA Technology Limited. Anionic Polymerization ", 2nd edition, J. MoI. V. Crivello and K.M. It can be found in standard textbooks such as by Dietliker. It may also be advantageous to include a sensitizer in combination with one or more photoinitiators to achieve efficient curing. Typical examples of suitable photosensitizers include, but are not limited to, isopropyl-thioxanthone (ITX), 1-chloro-2-propoxy-thioxanthone (CPTX), 2-chloro-thioxanthone (CTX) and 2,4 -Diethyl-thioxanthone (DETX), as well as mixtures thereof. The one or more photoinitiators included in the UV-Vis curable composition are preferably in an amount of about 0.1 wt% to about 20 wt%, more preferably an amount of about 1 wt% to about 15 wt%. The weight percent is based on the total weight of the UV-Vis curable composition.

  [077] Alternatively, a dual-curing coating composition may be used, such a composition having both a heat drying mechanism and a radiation curing mechanism. Typically, such compositions are similar to radiation curable compositions, but contain volatiles composed of water and / or solvents. Such volatile components are first volatilized using hot air and / or an IR dryer and then dried by UV-Vis to complete the solidification process.

  [078] The first plurality of magnetic or magnetizable pigment particles and the second plurality of magnetic or magnetizable pigment particles described herein comprise a first solidified coating and a second solidified coating. And the first and second solidified coatings include a solidified binder that fixes the position and orientation of the magnetic or magnetizable pigment particles. The magnetic or magnetizable pigment particles of the first solidified coating may be the same as or different from the magnetic or magnetizable pigment particles of the second solidified coating. The solidified binder is at least partially transparent to one or more wavelengths of electromagnetic radiation in the range of 200 nm to 2500 nm. The solidified binder is preferably transparent to electromagnetic radiation of one or more wavelengths in the range of 200 to 800 nm, more preferably in the range of 400 to 700 nm. As used herein, the term “one or more wavelengths” refers to a binder that is transparent for only one wavelength within a given wavelength range, or for several wavelengths within a given range. Means transparent. The binder is transparent for more than one wavelength within a given range, and more preferably is transparent for all wavelengths within a given range. Thus, in a more preferred embodiment, the solidified binder is at least partially transparent for all wavelengths in the range of about 200 to about 2500 nm (or 200 to 800 nm or 400 to 700 nm), more preferably The solidified binder is completely transparent to all wavelengths in those ranges. As used herein, the term "transparent" refers to a solidified binder (not including magnetic or magnetizable pigment particles and other optional components of the coating composition) when present in a security thread or stripe. Means that the transmittance of electromagnetic radiation through the 20 μm layer (including all such components if present) is at least 80%, more preferably at least 90%, even more preferably at least 95%. This is determined by measuring the transmittance of a test piece of solidified binder (without magnetic pigments or magnetizable pigment particles) according to established test methods, for example DIN 5036-3 (1979-11). be able to.

  [079] The magnetic or magnetizable pigment particles described herein are preferably present in an amount of about 5 wt% to about 40 wt%, more preferably about 10 wt% to about 30 wt%, The weight percent is based on the total weight of the coating composition.

  [080] The first plurality and / or the second plurality of magnetic or magnetizable pigment particles described herein are non-spherical pigment particles, more preferably an oblong or oblong ellipse. The shape, platelet-shaped or needle-shaped particles, or a mixed shape thereof is preferable.

[081] Suitable examples of magnetic or magnetizable pigment particles described herein include, but are not limited to, ferromagnetic or ferrimagnetic metals such as cobalt, iron, or nickel: iron, manganese, cobalt , Iron, or nickel ferromagnetic or ferrimagnetic alloys; chromium, manganese, cobalt, iron, nickel ferromagnetic or ferrimagnetic oxides, or mixtures thereof; and mixtures thereof. The ferromagnetic or ferrimagnetic oxide of chromium, manganese, cobalt, iron, nickel, or a mixture thereof can be a pure oxide or a mixed oxide. Examples of magnetic oxides include, but are not limited to, hematite (Fe ₂ O ₃ ), magnetite (Fe ₃ O ₄ ), chromium dioxide (CrO ₂ ), magnetic ferrite (MFe ₂ O ₄ ), magnetic spinel (MR ₂ O ₄ ), magnetic hexagonal ferrite (MFe ₁₂ O ₁₉ ), magnetic orthoferrite (RFeO ₃ ), magnetic garnet M ₃ R ₂ (AO ₄ ) ₃ and other iron oxides are included, and M is a divalent metal ion , R represents a trivalent metal ion, A represents a tetravalent metal ion, and “magnetic” represents ferromagnetism or ferrimagnetism.

  [082] At least some of the first plurality of magnetic or magnetizable pigment particles described herein and / or at least some of the second plurality of magnetic or magnetizable pigment particles are optical It is preferably constituted by pigment particles that change to magnetic or magnetizable. Such optically varying magnetic or magnetizable pigment particles are preferably non-spherical particles, more preferably oblong or oblong, platelet or needle pigment particles, or their Mixed shape. Optically changing elements are known in the field of security printing. Optically changing elements (also referred to in the art as color shift elements or goniochromatic elements) exhibit a color that depends on the viewing or incidence angle, and allow for color scanning, printing of banknotes and other security documents , And to protect against counterfeiting and / or illegal duplication by commonly available office equipment for copying. For example, a coating or layer comprising optically varying magnetic or magnetizable pigment particles may change when the viewing angle changes (e.g., from a viewing angle of about 90 ° to the surface of the coating or layer to On the other hand, a change in viewing angle of about 22.5 °), a color change from a color impression CI1 (eg green) to a color impression CI2 (blue). An optical that allows the security thread or stripe described herein to be easily detected, recognized and / or differentiated from counterfeit products that can be easily detected and / or recognized without human assistance. In addition to the obvious security gained by the color variability of magnetic or magnetizable pigment particles that change, the color variability of optically changing magnetic or magnetizable pigment particles recognizes security threads or stripes. It can also be used as a machine-readable means. Therefore, the color changeability of optically changing magnetic or magnetizable pigment particles is used simultaneously as a secret or semi-secret security function in authentication methods where the optical (eg spectral) properties of the particles are analyzed can do. The use of optically varying magnetic or magnetizable pigment particles increases the usefulness of the security thread or stripe described herein. The reason is that the use of such materials (ie optically changing magnetic or magnetizable pigment particles) is limited to the security document printing industry and is not commercialized to the public. .

  [083] The optically varying magnetic or magnetizable pigment particles described herein suitable for the first solidified coating and / or the second solidified coating comprise one or more magnetic materials. It is preferably selected from the group consisting of magnetic thin film interference pigments, magnetic cholesteric liquid crystal pigments, interference coating pigments, and mixtures thereof. The optically varying magnetic or magnetizable pigment particles of the first solidified coating are the same as or different from the magnetic or magnetizable pigment particles of the second solidified coating and are “same, `` Or different '' means that the chemical structure of the pigment particles is the same or different, or the color variability of the pigment particles is the same or different, or both are the same or different. means.

[084] Magnetic thin film interference pigments are known to those skilled in the art, for example, U.S. Pat. No. 4,838,648, WO 2002/073250, EP-A 686 675, WO 2003 / No. 00801, US Pat. No. 6,838,166, International Publication No. 2007/131833, and related literature. Because of its magnetic properties, the magnetic thin film interference pigment can be read by a machine, and thus the coating composition containing the magnetic thin film interference pigment can be detected, for example, with a specific magnetic detector. Thus, a coating composition comprising a magnetic thin film interference pigment can be used as a secret or semi-secret security element (authentication means) for security documents. The magnetic thin film interference pigment comprises a pigment having a five-layer Fabry-Perot multilayer structure and / or a pigment having a six-layer Fabry-Perot multilayer structure and / or a pigment having a seven-layer Fabry-Perot multilayer structure. Is preferred. A preferred five-layer Fabry-Perot multilayer structure comprises a multilayer structure comprising an absorber / dielectric / reflector / dielectric / absorber, wherein the reflector and / or absorber is a magnetic layer. A preferred six-layer Fabry-Perot multilayer structure comprises a multilayer structure comprising an absorber / dielectric / reflector / magnetic material / dielectric / absorber. A preferred seven-layer Fabry-Perot multilayer structure is a multilayer comprising absorber / dielectric / reflector / magnetic / reflector / dielectric / absorber as disclosed in US Pat. No. 4,838,648. More preferably, it has a multilayer structure including a seven-layer Fabry-Perot absorber / dielectric / reflector / magnetic material / reflector / dielectric / absorber. The reflector layer described herein is preferably selected from the group consisting of metals, metal alloys, and combinations thereof, and is selected from the group consisting of reflective metals, reflective metal alloys, and combinations thereof. More preferably, it is selected from the group consisting of aluminum (Al), chromium (Cr), nickel (Ni), and mixtures thereof, more preferably aluminum (Al). The dielectric layer is preferably independently selected from the group consisting of magnesium fluoride (MgF ₂ ), silicon dioxide (SiO ₂ ), and mixtures thereof, more preferably magnesium fluoride (MgF ₂ ). . The absorber layer is preferably selected independently from the group consisting of chromium (Cr), nickel (Ni), metal alloy, and mixtures thereof. The magnetic layer is selected from the group consisting of nickel (Ni), iron (Fe), and cobalt (Co), nickel (Ni), an alloy containing iron (Fe) and / or cobalt (Co), and mixtures thereof. It is preferred that Magnetic thin film interference _{pigment, Cr / MgF 2 / Al /} Ni / Al / of _MgF 2 / Cr 7 layers of multi-layer structure of the Fabry - Perot absorber / dielectric / reflector / magnetic / reflector / dielectric / It is particularly preferable to have a multilayer structure including an absorber. The magnetic thin film interference pigments described herein are typically made by vacuum depositing the various required layers on a web. After depositing the required number of layers, for example with PVD, the stacked layers are removed from the web by dissolving the release layer with a suitable solvent or by peeling the material from the web. The material so obtained must then be crushed into flakes which must be further ground, crushed or processed in a suitable manner. The resulting product consists of flat flakes with broken edges, irregular shapes, and different aspects. Further information on the preparation of suitable magnetic thin film interference pigments can be obtained, for example, in EP 1 710 756, which is incorporated herein by reference.

[085] Suitable magnetic cholesteric liquid crystal pigments that exhibit optically changing properties include, but are not limited to, single layer cholesteric liquid crystal pigments and multilayer cholesteric liquid crystal pigments. Such pigments are disclosed, for example, in WO 2006/063926, US Pat. No. 6,582,781, and US Pat. No. 6,531,221. WO 2006/063926 discloses monolayers and pigments obtained therefrom with high brightness and color variability and with additional specific properties such as magnetizability. The disclosed monolayer and the pigment obtained by pulverizing the monolayer comprise a mixture of sterically cross-linked cholesteric liquid crystals and magnetic nanoparticles. US Pat. No. 6,582,781 and US Pat. No. 6,410,130 disclose platelet-like cholesteric multilayer pigments containing the sequence A ¹ / B / A ² , where A ¹ and A ² are identical It may be different, and each includes at least one cholesteric layer, and B is an intermediate layer that absorbs all or part of the light transmitted through layers A ¹ and A ² and provides magnetism to the intermediate layer. US Pat. No. 6,531,221 discloses a platelet-like cholesteric multilayer pigment containing the arrangement A / B and C if necessary, where A and C are absorber layers containing pigments that provide magnetism, and B Is a cholesteric layer.

[086] Suitable interference coated pigments comprising one or more magnetic materials include, but are not limited to, a structure consisting of a substrate selected from the group consisting of a core coated with one or more layers. Included, at least one of the core or the one or more layers is magnetic. For example, suitable interference coated pigments include a core made of a magnetic material as described above, said core being coated with one or more layers made of metal oxide, synthetic or natural mica, Laminated silicates (eg talc, kaolin and sericite), glass (eg borosilicate), silicon dioxide (SiO ₂ ), aluminum oxide (Al ₂ O ₃ ), titanium oxide (TiO ₂ ), graphite, and their Including a core made of a mixture.

  [087] In addition to magnetic or magnetizable pigment particles (which may or may not consist of optically varying magnetic or magnetizable pigment particles), non-magnetic or non-magnetizable Possible particles can also be included in the coating compositions described herein. Such particles can be dyes or color pigments known in the art with or without optically changing properties. Further, such particles can be spherical or non-spherical and have isotropic or anisotropic optical reflectivity.

  [088] The coating compositions described herein may further comprise one or more machine-readable materials. When present, the machine readable material or materials are preferably selected from the group consisting of magnetic materials, luminescent materials, conductive materials, infrared absorbing materials, and mixtures thereof. As used herein, the term “machine-readable material” can be detected by a device or machine and includes a specific instrument for detection and / or authentication by inclusion in a coating. Refers to a material exhibiting at least one characteristic property that provides a means for authenticating the coating or an article comprising the coating.

  [089] The coating compositions described herein can further comprise one or more additives, including, but not limited to, the physical, rheological properties of the composition. Includes compounds and materials used to adjust chemical and chemical parameters such as viscosity (eg, solvents and surfactants), consistency (eg, anti-settling agents, fillers, plasticizers), foamability (For example, antifoaming agent), lubricity (wax), UV stability (photosensitizer and light stabilizer), and adhesiveness. The additives described herein can be present in the coating compositions described herein in amounts and forms known in the art, and such forms include particle size measurements. Included are so-called nanomaterial forms in which at least one is in the range of 1-1000 nm.

  [090] The coating compositions described herein include the magnetic or magnetizable pigment particles described herein and one or more additives, if present, described herein. Can be prepared by dispersing or mixing in the presence of a binding agent thereby forming a liquid composition. One or more photoinitiators, if present, are added to the composition during the step of dispersing or mixing all other ingredients, or at a later stage, i.e. after forming a liquid coating composition. be able to.

  [091] As noted above, the method according to the invention comprises a transparent substrate and a first plurality of oriented magnetic or magnetizable pigment particles dispersed in a first solidified coating as described herein. A second structure comprising a transparent substrate and a second plurality of oriented magnetic or magnetizable pigment particles dispersed in a second solidified coating dispersed herein. And laminating. The transparent substrate having the first structure and the transparent substrate having the second structure may be the same or different. The security thread or stripe produced by the method of the present invention comprises two transparent substrates, one transparent substrate belonging to the first structure and the other transparent substrate belonging to the second structure. It is preferable that the transparent base material of the first structure and the transparent base material of the second structure are made independently from one or more kinds of plastics or polymers. Typical examples of polymer or plastic substrates include polyolefins such as polyethylene and polypropylene (uniaxial or biaxially oriented polypropylene), polyamides, poly (ethylene terephthalate) (PET), poly (1,4-butylene terephthalate) (PBT). ), Polyesters such as poly (ethylene 2,6-naphthoic acid) (PEN), and polyvinyl chloride (PVC).

  [092] The transparent substrate of the first structure and / or the transparent substrate of the second structure can be a colored or metal-coated substrate, wherein the metal-coated substrate is a security thread or An indicator is included so that the first solidified coating and the second solidified coating of the stripe appear at least partially integrated from one side of the security thread or stripe described herein. Typical examples of metal coating materials include, but are not limited to, plastic or polymer materials (such as those described above) with discontinuous metal placement on the surface. Typical examples of metals include, but are not limited to, aluminum (Al), chromium (Cr), copper (Cu), gold (Au), iron (Fe), nickel (Ni), silver (Ag), Combinations thereof or alloys made of two or more of the above metals are included. The metal coating of the above material can be performed by an electrodeposition method, a high vacuum coating method, or a sputtering method. Typically, the thickness of the metal is about 1 to about 100 nanometers (nm). The metallized substrate markers described herein can consist of positive text or clear text. “Positive text” means that the sign is made of metal surrounded by a non-metallized area, and “clear text” is that the sign is made of negative text, ie written in negative form. It is made of a metal material including a metal removal portion having a label form. The metal removal portion can be generated by methods known to those skilled in the art, such as chemical etching, laser etching, or cleaning methods.

  [093] Automatically verifies the authenticity of the security thread described herein or the security thread, or the security document containing the security thread or stripe, by an authentication device such as an automated teller machine (ATM) For the purpose of facilitating, the method described herein is machine readable on a transparent substrate of a first structure and / or a transparent substrate of a second structure prior to the laminating step. And adding one or more layers. The machine-readable layer or layers can be continuous or discontinuous, and the first solidified coating and the second solidified coating of the security thread or stripe after lamination are Between the transparent substrate and the first solidified coating and / or the second solidified coating, provided that it appears at least partially integrated from one side of the security thread or stripe described in the specification. It is preferable to be added to. If present, the machine readable layer or layers are machine readable selected from the group consisting of magnetic materials, luminescent materials, conductive materials, infrared absorbing materials, and mixtures thereof. It is preferable to consist of materials.

  [094] To further enhance resistance to forgery or illegal duplication of security threads or stripes described herein, one or more concealment layers may be added, such as one readable by the above machine. Or it may be advantageous to hide information present in the security thread or stripe, such as information relating to multiple layers. For example, magnetic or other machine readable information that can be visually discerned can be more easily counterfeited if a potential counterfeiter can detect the presence and / or placement of magnetic regions to be read there is a possibility. If the magnetic or other machine readable information is not visible, the counterfeiter will not attempt to replicate that information, so the counterfeit will fail and be easily detected even if it is illegally copied. Typical examples of concealment layers include, but are not limited to, aluminum layers, black layers, white layers, opaque colored layers, and metal coating layers, and combinations thereof. As described above for the machine-readable layer or layers, the concealment layer or layers can be continuous or discontinuous, and the security thread or stripe first layer after lamination can be A machine-readable one, provided that one solidified coating and a second solidified coating appear to be at least partially integrated from one side of the security thread or stripe described herein. Alternatively, it is preferably added on a plurality of layers.

  [095] The first solidified coating and the second solidified coating of the laminate structure described herein may be adjacent to each other or spaced from each other. “Adjacent” means that the first solidified coating and the second solidified coating are in direct contact. “Separated” means that the first solidified coating and the second solidified coating are not in direct contact, and the security thread is between the first solidified coating and the second solidified coating. Or it means that there is a distance less than 50% of the width of the stripe, preferably about 5% to 35% of the width of the security thread or stripe.

  [096] As illustrated and illustrated in FIGS. 4A-4D, the first solidified coating (1) and / or the second solidified coating (2) of the laminate structure described herein is a It can exist continuously over the length of the security thread as described in the specification (FIGS. 4A and 4B). Alternatively, the first solidified coating (1) and / or the second solidified coating (2) of the laminate structure described herein may be continuous over the width of the security thread as described herein. (FIG. 4C). Alternatively, the first solidified coating (1) and / or the second solidified coating (2) of the laminate structure described herein may be discontinuous or of a sign such as a rectangle or a letter Can exist in a form (FIG. 4D).

  [097] A method of manufacturing a security thread or stripe according to the present invention comprises one or more adhesive layers, preferably one or more thermal adhesive layers, in the first of the security threads or stripes described herein. The method may further include a step of applying on the transparent substrate having the above structure and / or the transparent substrate having the second structure, and the step is preferably performed after the laminating step. The thread or stripe is incorporated into or inside the security document by adding one or more adhesive layers, preferably one or more thermal adhesive layers, to the surface of the security thread or stripe described herein. Sometimes adhesion to the security document is obtained.

  [098] A method of manufacturing a security thread or stripe according to the present invention slices the laminate structure obtained after the lamination step to produce a plurality of security threads or stripes that each exhibit the effect of a rolling bar rolling in opposite directions. A step can further be included. The laminated structure is preferably sliced to obtain a plurality of security threads or stripes that are about 0.5 mm to about 30 mm in width, i.e., transverse direction, more preferably about 0.5 mm to about 5 mm. If the step of adding one or more adhesive layers to the transparent substrate of the first structure and / or the transparent substrate of the second structure is performed as described herein, the laminated structure is sliced The step is performed after applying one or more adhesive layer steps.

  [099] Also described herein are security threads or stripes manufactured by the methods described herein.

  [0100] Also described herein is a security thread and a security document including the security thread. The security thread includes a stacked structure including a first structure and a second structure. Each of the first and second structures includes a transparent substrate and a plurality of magnetic or magnetizable pigment particles. The pigment particles are dispersed in the solidified coating and are oriented to exhibit a rolling bar effect. The transparent substrate faces outward in the laminated structure, and the solidified coating of the first and second structures is included between the transparent substrates in the laminated structure. The first or second structure has an uncovered portion through which the other of the underlying first or second structures can be oriented magnetically or magnetizable from one side of the security thread or stripe Pigment particles can be seen. Therefore, the rolling bar effect obtained by the oriented pigment particles of the first structure and the second structure appears to be integrated from one side of the security thread or stripe. The integration effect is the effect that the rolling bar provided by the first and second structures, respectively, rolls in the opposite direction when the security thread or stripe is tilted. The magnetic or magnetizable pigment particles of the first structure have an orientation that follows a convex curve when viewed from one side of the security thread or stripe, and the magnetic or magnetizable pigment particles of the second structure are When viewed from one side of the security thread or stripe, it has an orientation that follows a concave curvature, thereby forming a rolling bar that rolls in the opposite direction.

  [0101] The security document provided by the present invention includes such a security thread or stripe. The security thread or stripe is at least partially embedded in the security document, or the security thread or stripe is attached to the surface of the security document.

  [0102] Security threads or stripes are particularly suitable for protecting security documents from forgery and fraud. Accordingly, the present invention provides a method of manufacturing a security document including the security thread or stripe described in the specification, and the security document obtained thereby.

  [0103] Security documents are typically selected from various technical fields, manufactured by various sources, and protected with a number of security functions implemented on various components of the security document. To break the protection of security documents, counterfeiters need to get all suggested materials and use all the necessary processing techniques, which is almost impossible to achieve . Examples of security documents include, but are not limited to, high value documents and high value products. Typical examples of high-value documents include, but are not limited to, banknotes, certificates, tickets, checks, receipts, revenue stamps, tax labels, contracts, and other identities such as passports and ID cards. Certificates, visas, bank cards, credit cards, transaction cards, access documents, admission tickets, etc. are included. The term “high value merchandise” refers to a pharmaceutical, cosmetic, electronic device, or one that may include one or more security features to guarantee the contents of the packaging material, in particular, the packaging, eg, genuine medicine. Refers to packaging materials in the food industry. Examples of such packaging materials include, but are not limited to, a label indicating that the brand is genuine, a tamper-proof label, a label such as a seal, and the like. The security document described herein is preferably selected from the group consisting of banknotes, passports, ID cards, identity certificates such as driver's licenses, more preferably banknotes.

  [0104] Security threads or stripes produced by the method of the present invention can be incorporated into or inside security documents, particularly paper and polymers used to produce security documents, forgery of security threads or stripes. It can confer resistance to illegal duplication. The present invention provides a method of manufacturing a security document that includes a security thread or stripe.

  [0105] A method of manufacturing a security document as described herein includes at least partially embedding a security thread or stripe manufactured by the method described herein in a security document, or Attaching a security thread or stripe produced by the method described in 1 above to the surface of the security document.

  [0106] The security thread or stripe described herein is at least a portion of the security document as a window-like security thread or stripe such that the security thread or stripe is at least partially visible from one side of the security document. Can be embedded. If the security document includes a substrate that is a security paper, the security threads or stripes described herein may be at least partially incorporated into the security paper when manufactured with techniques commonly used in the paper industry. it can. For example, the security thread or stripe described herein can be pressed into the fiber while the wet paper fiber is unconsolidated and flexible so that the security thread or stripe is complete. Completely embedded in the security paper. The security thread or stripe described herein can be fed into a cylinder mold paper machine, cylinder bat machine or similar machine of a known type to place the security thread or stripe in the finished paper body. It can also be partially embedded (ie paper with a window).

  [0107] Alternatively, the security threads or stripes described herein may be placed entirely on the surface of the security document as a movable element. In such cases, the security thread or stripe described herein includes, but is not limited to, a heat activated adhesive on the surface of the security thread or stripe that applies a pressure sensitive adhesive to the surface of the security thread or stripe. Can be attached to the surface of the security document by known techniques such as applying a thermal transfer technique or using a thermal transfer technique.

  [0108] The invention will now be described in more detail in the context of non-limiting examples.

  [0109] 100 g of the coating composition was prepared by mixing the ingredients listed in Table 1. Mixing at room temperature was performed using a dispersion propellant (stainless steel, 4.0 cm diameter) for 10 minutes at a speed of 2000 rpm.

  [0110] The coating composition was applied to a transparent substrate (PET, cut into 12 micron, 1 meter long strips) and a rotogravure at a speed of 30 m / min (TESTACOLOR FTM sold by Norbert Schlafl Engel Machinen) -145), a precursor structure in the form of a pattern having a width of 4 mm and a continuous stripe shape in the printing direction with a 4 mm non-printing gap between the stripes was formed. The coating composition was applied and simultaneously magnetized as the PET passed between the gravure cylinder and the pressure roller. The coating composition was solidified using a 1 meter long IR heating tunnel at a temperature of 100 ° C. to fix the position and orientation of the optically changing magnetic or magnetizable pigment particles.

  [0111] Orientation of optically varying magnetic or magnetizable pigment particles was achieved using a magnetic field generator. A TESTACOLOR FTM-145 pressure roller was wound using a thin piece of Plastoferrite foil. Plastoferrite foil was 1 mm thick and had a multipole magnetic field. A rectangular strip (16 cm x 18 cm) was cut out of the plasterferrite foil so that there was no seam in the repetitive magnetic image where the two ends of the foil met together, smoothly and smoothly around the surface of the pressure roller. . Finally, the foil was firmly fixed to the pressure roller with scotch tape so as not to affect the smooth and cylindrical surface.

  [0112] On the printing side of the PET base material, a homogeneous layer made of laminating glue was added with a Mayer bar (manual coating bar, Nr. 3) and dried for 10 seconds with a hot air blower.

  [0113] A first structure comprising a coating solidified on a PET substrate and a second coating comprising a solidified coating on the PET substrate by cutting the precursor structure so obtained in the coating direction. Two square strips (10 cm × 10 cm) consisting of the structure were obtained. A first solidified coating and a second solidified coating are included between the PET substrates so that both PET substrates are facing towards the periphery and appear to be integrated from one side of the assembly As such, one of the two strips was placed over the other strip. The assembly thus obtained was fixed with scotch tape, inserted between two carton papers and laminated four times at 120 ° C. for 20 seconds (Laminator: US Pat. No. 3,770,550) The laminator model 6000) described.

[0114] The resulting laminated structure is then sliced to obtain a 4 mm wide security thread, the security thread comprising a 2 mm wide first solidified coating and a 2 mm wide second solidified coating Both stripes were visible from the same side of the security thread and presented a visual impression that moved in opposite directions as the security thread was tilted.

Claims (17)

A method of manufacturing a security thread or stripe, the first structure comprising a transparent substrate and a first plurality of magnetic or magnetizable pigment particles, wherein the pigment particles are of a first solidified coating. A first substrate comprising a transparent substrate and a second plurality of magnetic or magnetizable pigments, wherein the first structure is oriented to follow a convex curvature when viewed from the side with the first solidified coating The pigment particles are dispersed in a second solidified coating and oriented to follow a convex curve when viewed from the side with the second solidified coating. Laminating with the second structure,
As a result, the transparent base material faces in the surrounding direction, and the first solidified coating and the second solidified coating are included between the transparent base materials to form a laminated structure,
The first solidified coating and the second solidified coating are adjacent to or spaced apart from each other;
The first solidified coating and the second solidified coating appear to be at least partially integrated from one side of the security thread or stripe;
The laminated structure has the first conforming to a convex curve when viewed from the side of the security thread or stripe where the first solidified coating and the second solidified coating appear to be at least partially integrated. Of the security thread or stripe of the first solidified coating, the first solidified coating, and the second solidified coating appearing to be at least partially integrated. A second solidified coating comprising the second plurality of magnetic or magnetizable pigment particles having an orientation according to a concave curvature when viewed from the side, thereby forming a multiple rolling bar effect how to.   The first structure and / or the second structure is a) preferably on the transparent substrate with a binder by a printing method selected from the group consisting of rotogravure, screen printing, and flexographic printing. Applying a coating composition comprising the plurality of magnetic or magnetizable pigment particles; b) exposing the coating composition in a first state to a magnetic field of a magnetic field generator; c) the coating composition And solidifying the second state to fix the magnetic or magnetizable pigment particles in their selected positions and orientations to obtain a solidified coating. Item 2. The method according to Item 1.   The first structure and the second structure are a) preferably on the transparent substrate by a printing method selected from the group consisting of rotogravure, screen printing, and flexographic printing. Applying a coating composition comprising: magnetic or magnetizable pigment particles; b) exposing the coating composition in a first state to a magnetic field of a magnetic field generator; c) the coating composition Solidifying into a second state to fix the magnetic or magnetizable pigment particles in their selected position and orientation to obtain a solidified coating; and d) obtained in step c). 2. The method of claim 1, wherein the method is fabricated from a precursor structure created by cutting the resulting precursor structure to obtain the first structure and the second structure.   4. A method according to claim 2 or 3, wherein said exposing step b) is performed by applying a magnetic orientation cylinder.   5. The coating step a) is performed simultaneously with the step b) of orienting the magnetic or magnetizable pigment particles by exposing the coating composition to a magnetic field of a magnetic field generator. The method according to item.   6. The solidification step c) is performed simultaneously with step b) of orienting the magnetic or magnetizable pigment particles by exposing the coating composition to a magnetic field of a magnetic field generator. The method according to item.   The method according to any one of claims 2 to 6, wherein the solidification step c) is performed using warm air, radiation, or any combination thereof.   The method according to claim 1, further comprising slicing the stacked structure.   At least some of the first plurality of magnetic or magnetizable pigment particles and / or at least some of the second plurality of magnetic or magnetizable pigment particles contain one or more types of magnetic materials. The method according to claim 1, comprising a magnetic thin film interference pigment, a magnetic cholesteric liquid crystal pigment, an interference coating pigment, and a mixture thereof.   The magnetic thin film interference pigment has a multilayer structure including five layers of Fabry-Perot absorber / dielectric / reflector / dielectric / absorber, six layers of Fabry-Perot absorber / dielectric / reflector / dielectric / 10. A method according to claim 9, comprising a pigment having a multilayer structure comprising an absorber and / or a multilayer structure comprising seven layers of Fabry-Perot absorber / dielectric / reflector / dielectric / absorber. The magnetic thin film interference pigment is a pigment having a multilayer comprising 7 layers of Fabry-Perot absorber / dielectric / reflector / magnetic material / reflector / dielectric / absorber, preferably Cr / MgF ₂ / Al / Ni The method according to claim 9, comprising a pigment having a multilayer structure consisting of / Al / MgF ₂ / Cr.   The transparent substrate of the first structure and the transparent substrate of the second structure are each independently made from one or more kinds of plastics or polymers. The method according to item.   The method according to claim 12, wherein the transparent substrate of the first structure and / or the transparent substrate of the second structure is a metal-coated substrate.   14. The method according to any one of claims 1 to 13, further comprising adding one or more adhesive layers to the transparent substrate of the first structure and / or the transparent substrate of the second structure. The method described. A method for producing a security document comprising a security thread or stripe, comprising:
i) producing the security thread or stripe by the method of any one of claims 1-14;
ii) at least partially embedding the security thread or stripe obtained in step i) in the security document or attaching the security thread or stripe obtained in step i) to the surface of the security document When,
Including methods.   A security thread or stripe comprising a laminated structure, wherein the laminated structure comprises a first structure and a second structure, each of the first and second structures being transparent and a plurality of magnetic or magnetizable Pigment particles dispersed in a solidified coating, oriented to exhibit a rolling bar effect, the transparent substrate facing outward in the laminated structure, and the first And the solidified coating of a second structure is included between the transparent substrates in the laminated structure, the first or second structure having an uncoated portion, through the portion, the security thread or From one side of the stripe, the oriented magnetic or magnetizable pigment particles of the other of the first or second structures below can be seen, and the first structure and the second structure can be seen. The orientation The rolling bar effect obtained by the material particles appears to be integrated from the one side of the security thread or stripe, the integration effect being the first and second respectively when the security thread or stripe is tilted. A security thread or stripe, which is the effect that the rolling bar provided by the structure rolls in the opposite direction. 17. A security document comprising a security thread or stripe according to claim 16, wherein the security thread or stripe is at least partially embedded in the security document, or the security thread or stripe is a surface of the security document. A security document attached to a computer.

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